Angular speckle correlations and speckle removal in multimode fiber laser delivery

Summary form only given. Laser beam delivery via relatively short lengths of multimode fiber is common in remote sensing, imaging, surgery, and plasma physics. If the bandwidth of the laser in use is narrower than the coherence bandwidth of the fiber, a speckle pattern will emerge from the end of th...

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Bibliographic Details
Main Authors: Moon, J.A., Busse, L.E., Aggarwal, I.D.
Format: Conference Proceeding
Language:English
Subjects:
Bandwidth
Fiber lasers
Laser beams
Laser surgery
Laser theory
Particle beams
Physics
Plasmas
Remote sensing
Speckle
Online Access:Request full text
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Summary:Summary form only given. Laser beam delivery via relatively short lengths of multimode fiber is common in remote sensing, imaging, surgery, and plasma physics. If the bandwidth of the laser in use is narrower than the coherence bandwidth of the fiber, a speckle pattern will emerge from the end of the fiber. We describe here the long-range correlations between these speckle spots, and a method to remove this speckle by modulating the launch angle into the fiber in time.